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4 years ago

In the chemical formula 3nh3, how many atoms of hydrogen (h) are there? 3 6 9 11

Chemistry

2 answers:

ANTONII [103]4 years ago

7 0

Your answer is 3! Hope you get a good grade :)♥

Sergeeva-Olga [200]4 years ago

5 0

Answer: There are 9 hydrogen atoms in the given chemical formula.

Explanation:

We are given a chemical formula of ammonia which is $NH_3$

This molecule is formed by the combination of hydrogen and nitrogen atoms.

In 1 mole of ammonia, 1 atom of nitrogen is there and 3 atoms of hydrogen is there.

We are given:

Moles of ammonia = 3

So, 3 atoms of nitrogen is there and 9 atoms of hydrogen is there.

Hence, there are 9 hydrogen atoms in the given chemical formula.

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The actual number of pennies in a jar is 218. You miscounted and came up with 215 pennies. What is your percent error?

Katyanochek1 [597]

Answer:

Explanation:

Substract the actual error from the final and multiply by 100

6 0

3 years ago

4. What is the difference between an open system and a closed system?

Nimfa-mama [501]

Systems can exist in three ways as open systems, closed systems, and isolated systems. The main difference between open and closed system is that in an open system, matter can be exchanged with the surrounding whereas, in a closed system, matter cannot be exchanged with the surrounding.

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3 years ago

Can you balance 12 blocks on the 3x2 platform

Jobisdone [24]

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2 years ago

A 0.200 g sample of unknown metal x is dropped into hydrochloride acid and realeases 80.3 mL of hydrogen gas at STP using ideal

s344n2d4d5 [400]

Answer:

The number of mole of the unknown metal is 3.58×10¯³ mole

Explanation:

We'll begin by calculating the number of mole hydrogen gas, H2 that will occupy 80.3 mL at stp.

This is illustrated below:

Recall:

1 mole of any occupy 22.4L or 22400 mL at stp.

1 mole of H2 occupies 22400 mL at stp.

Therefore, Xmol of H2 will occupy 80.3 mL at stp i.e

Xmol of H2 = 80.3/22400

Xmol of H2 = 3.58×10¯³ mole

Therefore, 3.58×10¯³ mole of Hydrogen gas was released.

Now, we can determine the mole of the unknown metal as follow:

The balanced equation for the reaction is given below:

X + 2HCl —> XCl2 + H2

From the balanced equation above,

1 mole of the unknown metal reacted to produce 1 mole of H2.

Therefore, 3.58×10¯³ mole of the unknown metal will also react to produce 3.58×10¯³ mole of H2.

Therefore, the number of mole of the unknown compound is 3.58×10¯³ mole.

5 0

3 years ago

What is the purpose of adding phenolphthalein to your Erlenmeyer flask prior to starting a titration?

koban [17]

Answer:

a. The phenolphthalein acts as a color changing indicator to signal the endpoint of the reaction.

Explanation:

Phenolphthalein is an organic substance with chemical formula $C_{20}H_{14}O_{4}$ .

It is a substance commonly used in acid-base titrations to indicate the end point in the titration because phenolphthalein is colorless in acidic solutions but turns a purplish-pink color in basic solutions.

In this way it helps visually to notice when the final point of the titration has been reached.

3 0

3 years ago